Light emitting unit, display, and lighting apparatus

Abstract

There are provided a light emitting unit that enhances the uniformity of in-plane colors, as well as a display and a lighting apparatus that include such a light emitting unit thereon. The light emitting unit includes: a plurality of light emitting sections each having a light source and a wavelength conversion member, the wavelength conversion member converting a wavelength of light emitted from the light source; an optical component having a light incident surface in opposition to the plurality of light emitting sections; and a color unevenness prevention structure suppressing direct entering of light from the light source into the optical component.

What is claimed is: 
     
       1. A display comprising:
 a liquid crystal display panel; 
 a reflection member facing a rear side of the liquid crystal panel and including a light diffusion function; and 
 a lighting apparatus positioned between the reflection member and the liquid crystal display panel, 
 wherein the lighting apparatus comprises:
 a plurality of light emitting sections each having a light source and a wavelength conversion member, the wavelength conversion member converting a wavelength of light emitted from the light source, the wavelength conversion member including a wavelength conversion material that includes quantum dots, the quantum dots having an axis of 1 nanometer to 100 nanometers and being in a resin in the form of a film positioned to receive the light; 
 an optical component having a light incident surface in opposition to the plurality of light emitting sections, in which the optical component includes a light emission surface that faces the rear side of the liquid crystal display panel and is perpendicular to the light incident surface, in which the light emission surface has an uneven pattern; 
 an optical sheet that includes a diffusion sheet and that is positioned over the optical component; and 
 a prevention structure suppressing entry of light from a first light emitting section into an adjacent light emitting section, and in which the prevention structure has a number of concave sections, each concave section being configured in relation to a respective end of a respective one of plurality of light emitting sections. 
 
 
     
     
       2. The display of  claim 1 , wherein the uneven pattern of the optical component comprises convex sections. 
     
     
       3. The display of  claim 1 , wherein each of the plurality of light sections include a plurality of light sources, and the plurality of light sources within at least one light section of the plurality of light sections is arrayed at a first predetermined pitch, the first predetermined pitch being different than a second predetermined pitch between the at least one light section and an adjacent light section. 
     
     
       4. The display of  claim 3 , wherein the second predetermined pitch is greater than the first predetermined pitch. 
     
     
       5. A display comprising:
 a liquid crystal display panel; 
 a reflection member facing a rear side of the liquid crystal panel and including a light diffusion function; and 
 a lighting apparatus positioned between the reflection member and the liquid crystal display panel, 
 wherein the lighting apparatus comprises:
 light sources and a wavelength conversion member, the wavelength conversion member converting a wavelength of light emitted from the light sources, the wavelength conversion member including a wavelength conversion material that includes quantum dots, the quantum dots having an axis of 1 nanometer to 100 nanometers and being in a resin in the form of a film positioned to receive the light; 
 an optical component having a light incident surface in opposition to the light sources, in which the optical component includes a light emission surface that faces the rear side of the liquid crystal display panel; 
 an optical sheet that includes a diffusion sheet and that is positioned over the optical component; 
 at least one light source substrate that supports the light sources; and 
 a prevention structure having one or more concave sections, the prevention structure being arranged relative to a first light source and associated first wavelength conversion member such that light from the first light source is prevented from being absorbed by neighboring conversion member regions. 
 
 
     
     
       6. The display of  claim 5 , wherein the light emission surface has an uneven pattern. 
     
     
       7. The display of  claim 6 , wherein the uneven pattern of the optical component comprises convex sections. 
     
     
       8. The display of  claim 5 , wherein the light sources are light emitting diodes that generate blue light. 
     
     
       9. The display of  claim 8 , wherein the at least one light source substrate has a wiring pattern. 
     
     
       10. The display of  claim 9 , wherein the optical component is a waveguide. 
     
     
       11. A light emitting unit comprising:
 a plurality of light emitting sections each having a light source and a wavelength conversion member, wherein each said light source is configured to emit light in a first wavelength range, and wherein each said wavelength conversion member includes a wavelength conversion material and is configured to convert the emitted light in the first wavelength range, the wavelength conversion material contain particles having an axis of 1 nanometer to 100 nanometers and being in a resin in the form of a film positioned to receive the light; 
 an optical guide component having a light incident surface in opposition to the plurality of light emitting sections; 
 an optical sheet that includes a diffusion sheet and that is positioned over the optical guide component; 
 a reflection member positioned under the light emitting sections and under the optical guide component and including a light diffusion function; and 
 a prevention structure configured to suppress the emitted light in the first wavelength range from entering into the optical guide component, 
 wherein the prevention structure includes a wavelength conversion section disposed between at least a pair of adjacent wavelength conversion members, and the wavelength conversion member is spaced from and confronts a respective end of each of the adjacent wavelength conversion members, and in which the prevention structure has a number of circular concave sections, each concave section being configured in relation to the respective end of a respective one of the adjacent wavelength conversion members. 
 
     
     
       12. The light emitting unit according to  claim 11 , wherein the prevention structure absorbs the emitted light in the first wavelength range heading directly toward the optical guide component. 
     
     
       13. The light emitting unit according to  claim 11 , wherein the prevention structure is a color unevenness prevention structure composed of the wavelength conversion section. 
     
     
       14. The light emitting unit according to  claim 11 , wherein the prevention structure includes a wavelength conversion film containing a fluorescent painting material. 
     
     
       15. The light emitting unit according to  claim 11 , wherein the wavelength conversion member includes quantum dots. 
     
     
       16. The light emitting unit according to  claim 11 , wherein
 the optical guide component is a light guide plate, and 
 the light incident surface is an end surface of the light guide plate. 
 
     
     
       17. The light emitting unit according to  claim 11  wherein the light source is a blue-color light source. 
     
     
       18. The light emitting unit according to  claim 11 , wherein the light source is an LED. 
     
     
       19. The light emitting unit according to  claim 11 , in which the wavelength conversion member is configured to absorb blue-color light emitted from the light source to convert a part of the blue-color light into light in a red-color light range or a green-color light range so that the light emitted from the light source passes through the wavelength conversion member, in which the wavelength conversion member is configured to synthesize given light in a given red-color light range, given light in a given green-color light range, and given light in a given blue-color light range to generate white-color light. 
     
     
       20. The light emitting unit according to  claim 19 , in which the red-color light range is a wavelength range from about 620 nm to about 750 nm and the green-color light range is a wavelength range from about 495 nm to about 570 nm.